Unless you've been hyper-vigilant about shielding yourself from the sun (think living in a cave) since you were knee-high, the signs of aging skin -- fine lines, wrinkles, brown spots -- are likely to emerge by the time you enter your fourth decade. "Ninety-five percent of wrinkles are due to sun exposure," says Doris Day, M.D., assistant clinical professor of dermatology at New York University Medical Center.
Consider a wrinkle eraser that includes retinol, a form of vitamin A, to reduce fine lines and wrinkles, fade brown spots and smooth skin tone. Retinol or tretinoin topical creams exfoliate the skin and increase the production of collagen. The creams come in a concentration of 0.02 percent and 0.05 percent so just about everyone can tolerate it, and they may even help some people who have early signs of sun damage or skin cancer. Expect to spend about $10 to $15 a month.